|Toshka Lakes, Southern Egypt : Image of the Day - NASA -- Image provided by the Earth Science and Image Analysis Laboratory, Johnson Space Center|
New lakes in southern Egypt have been monitored by astronauts since 1998. The animation links together several photographs of the region taken by astronauts to show the sequence of flooding in the Toshka depression. The flooding was first documented in early November 1998. Subsequently, three additional lakes were created by Lake Nasser overflow, as shown by the above photograph ( eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=STS103&roll=712&frame=7 STS103-712-7 ) taken in December of 1999...
Keywords: What -- Earth; Where -- Egypt
|First Global Carbon Monoxide (Air Pollution) Measurements: Image of the Day - NASA -- Images and animation courtesy NASA GSFC svs.gsfc.nasa.gov/ Scientific Visualization Studio, based on data from MOPITT ( www.science.sp-agency.ca/J1-MOPITT(Eng).htm Canadian Space Agency and www.atmosp.physics.utoronto.ca/MOPITT/home.html University of Toronto .)|
NASA's terra.nasa.gov Terra spacecraft has assembled the most complete view ever of the world's air pollution traveling through the atmosphere, across continents and oceans. For the first time, policymakers and scientists now have a way to identify the major sources of air pollution and to closely track where the pollution goes, anywhere on Earth. The false colors in these images represent levels of carbon monoxide in the lower atmosphere, ranging from about 390 parts per billion (dark brown pix...
Keywords: What -- Terra; What -- Earth; Where -- Toronto
|NASA Launches Aqua Satellite: Image of the Day - NASA -- Images and animation courtesy Reto Stöckli, NASA Earth Observatory|
NASA's latest Earth Observing System (EOS) satellite -- aqua.nasa.gov Aqua -- successfully launched Saturday morning, May 4, 2002. Aqua is dedicated to advancing scientific understanding of Earth's water cycle and environment. Launching the Aqua spacecraft marks a major milestone in support of NASA's mission to help us better understand and protect our planet. The images above are computer-generated models of the Aqua spacecraft and the Delta II rocket that carried the satellite into orbit...
Keywords: What -- Earth; What -- EOS; What -- Aqua
|Solar Flare Aimed at Earth : Image of the Day - NASA -- Image courtesy SOHO Extreme ultaviolet Imaging Telescope, ESA/NASA|
At the height of the solar cycle, the Sun is finally displaying some fireworks. This image from the Solar and Heliospheric Observatory (SOHO) shows a large solar flare from June 6, 2000 at 1424 Universal Time (10:24 AM Eastern Daylight Savings Time). Associated with the flare was a coronal mass ejection that sent a wave of fast moving charged particles straight towards Earth. (The image was acquired by the Extreme ultraviolet Imaging Telescope (EIT), one of 12 instruments aboard SOHO) Solar acti...
Keywords: What -- Sun; What -- SOHO; What -- FAST; What -- Earth
|Lightning Strike Patterns Over Oklahoma : Image of the Day - NASA -- Animation by Robert Simmon, courtesy of the Global Hydrology and Climate Center|
In this animation, lightning flashes -- recorded during the NASA Lightning Imaging Sensor's pass over storms moving through Oklahoma in October 1998 -- are overlaid on high-resolution infrared cloud-top data from the orbiting Tropical Rainfall Measuring Mission (TRMM) satellite. High flash rates visible in the heaviest storm areas may indicate the potential for tornado formation. With an optical sensor locked into geostationary orbit over the Earth, such useful information would be available con...
Keywords: What -- Tropical Rainfall Measuring Mission (TRMM); What -- Earth; Where -- Oklahoma
|Image Transformations-Montserrat: Image of the Day - NASA -- The original image was digital photograph number eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS002&roll=ESC&frame=9309 ISS002-E-9309 , taken on July 9, 2001, from the International Space Station and was provided by the eol.jsc.nasa.gov/ Earth Sciences and Image Analysis Laboratory at Johnson Space Center. Additional images taken by astronauts and cosmonauts can be viewed at the eol.jsc.nasa.gov/sseop/ NASA-JSC Gateway to Astronaut Photography of Earth. mni.ms Bill Innanen provided the transformed image and the story of how he did it.|
A slightly oblique digital /IOTD/view.php?id=2043 photograph of Montserrat taken from the International Space Station was posted to Earth Observatory in December 2001. An Earth Observatory reader used widely available software to correct the oblique perspective and adjust the color. The story of how he modified the image includes step-by-step instructions that can be applied to other photographs. /IOTD/view.php?id=1133 Photographs of Earth taken by astronauts have shaped our view of the Earth an...
Keywords: What -- International Space Station (ISS); What -- Earth; Where -- Montserrat
|Solar Flare Aimed at Earth : Image of the Day - NASA -- Courtesy of SOHO/LASCO, SOHO/EIT, and SOHO/MDI consortium. SOHO is a project of international cooperation between ESA and NASA.|
At 10:40 UTC on September 24, 2001, a large solar flare erupted from the surface of the sun. Pointed almost directly towards the Earth, the flare caused a coronal mass ejection (CME). Coronal mass ejections are composed of fast-moving clouds of ionized gas. These energetic particles can interfere with wireless communications, damage satellites, disrupt the transmission of electricity, and energize the Earth's upper atmosphere, causing auroras...
Keywords: What -- Sun; What -- Earth; What -- FAST; What -- SOHO; What -- Extreme Ultraviolet Imaging Telescope
|A Look Inside Hurricane Alma: Image of the Day - NASA -- Image and animation courtesy Lori Perkins, NASA Goddard Space Flight Center svs.gsfc.nasa.gov/ Scientific Visualization Studio|
Hurricane season in the eastern Pacific started off with a whimper late last month as Alma, a Category 2 hurricane, slowly made its way up the coast of Baja California, packing sustained winds of 110 miles per hour and gusts of 135 miles per hour. The above image of the hurricane was acquired on May 29, 2002, and displays the rainfall rates occurring within the storm. Click the image above to see an animated data visualization (3.8 MB) of the interior of Hurricane Alma...
Keywords: What -- Environmental Satellite; What -- Tropical Rainfall Measuring Mission (TRMM); What -- Earth; Where -- California
|Seasonal Swings in Tropical Rainfall: Image of the Day - NASA -- NASA Image Of The Day|
Rainfall is the primary way the atmosphere spreads heat around. Not surprisingly, nearly two-thirds of all rain falls in the tropics, where incoming sunlight is steady year round. Sunlight evaporates water from the warm ocean and land surfaces. The water vapor holds on to the heat that drove its evaporation until it condenses back into rain drops and releases the heat back to the atmosphere. This perpetual cycle of heating, evaporation, condensation, and rainfall moves heat from one place on Ear...
Keywords: What -- Earth; What -- Tropical Rainfall Measuring Mission (TRMM); Where -- Goddard Space Flight Center (GSFC); Where -- Indonesia; Where -- Australia
|Global Carbon Monoxide in September 2005: Image of the Day - NASA -- Image courtesy NASA Jet Propulsion Laboratory|
The streak of red, orange, and yellow across South America, Africa, and the Atlantic Ocean in this image points to high levels of carbon monoxide on September 30, 2005, as measured by the Atmospheric Infrared Sounder ( airs.jpl.nasa.gov/ AIRS ) instrument flying on NASA's aqua.nasa.gov/ Aqua satellite. The carbon monoxide primarily comes from fires burning in the Amazon basin, with some additional contribution from fires in southern Africa...
Keywords: What -- Atmospheric Infrared Sounder; What -- AIRS; What -- Aqua; What -- Earth; Where -- Atlantic Ocean; Where -- Indian Ocean; Where -- Maryland
|Massive Solar Flare: Image of the Day - NASA -- Images courtesy sohowww.nascom.nasa.gov/ Solar & Heliospheric Observatory|
A massive solar flare erupted from the surface of the Sun at 9:51 UTC on October 28, 2003. The solar flare persisted for more than an hour, peaking at 11:10 UTC. Associated with the flare was an ejection of a billion tons or more of gas from the Sun's tenuous outer atmosphere, or corona. Both the flare and the coronal mass ejection accelerated electrically charged particles to very high energies and hurled them at near the speed of light directly toward the Earth...
Keywords: What -- Sun; What -- Earth; What -- SOHO; What -- Imager; What -- Extreme Ultraviolet Imaging Telescope; What -- Aurorae; Where -- Canada
|Zoom in on Los Angeles, California : Image of the Day - NASA -- Animation courtesy NASA GSFC Scientific Visualization Studio, based on data from MODIS, Landsat 7, and Space Imaging's IKONOS. Still image copyright www.spaceimaging.com/ Space Imaging, Inc.|
Satellite remote sensors view the Earth at many scales of space, ranging from global through continental, regional, and local--even observing details as small as one meter (three feet) across. These data enable scientists to study a wide range of phenomena that occur over these same scales of space, such as El Nino, droughts, storms, and flash floods. The above image shows the Hollywood sign above Los Angeles, California...
Keywords: What -- Earth; What -- Terra; What -- Landsat 7; Where -- Los Angeles; Where -- California
|Unprecedented Fires in Southern Africa : Image of the Day - NASA -- Image courtesy NASA Goddard Space Flight Center, svs.gsfc.nasa.gov/ Science Visualization Studio|
The fires that raged across southern Africa this August and September produced a thick ''river of smoke'' over the region. NASA-supported studies currently underway on the event will contribute to improved air pollution policies in the region and a better understanding of its impact on climate change. This year the southern African fire season peaked in early September. The region is subject to some of the highest levels of biomass burning in the world...
Keywords: What -- NOAA 14; Where -- Virginia; What -- Earth; What -- Spectrometer; Where -- Zambia; Where -- Angola; Where -- Namibia; Where -- Botswana; Where -- Goddard Space Flight Center (GSFC); Where -- United States of America
|Irrigation in the Heart of the Sahara: Image of the Day - NASA -- Images and animation by Robert Simmon, based on data aqcuired by the landsat.gsfc.nasa.gov/ Landsat 7 Science Team Landsat data is archived and distributed by the |
Although it is now the largest desert on Earth, during the last ice age the Sahara was a savannah with a climate similar to that of present-day Kenya and Tanzania. The annual rainfall was much greater than it is now, creating many rivers and lakes that are now hidden under shifting sands or exposed as barren salt flats. Over several hundred thousand years the rains also filled a series of vast underground aquifers...
Keywords: What -- Earth; Where -- Morocco; Where -- Algeria; Where -- United States of America; What -- Landsat 7; Where -- Kenya; Where -- Tanzania; Where -- Egypt; Where -- Sudan; Where -- Libya; Where -- Chad; Where -- Tunisia